Bug 501970

Summary:	Mouse wheel Zoom functionality stops to work at all, seemingly without cause
Product:	[Applications] krita	Reporter:	Aza <azagwen>
Component:	OpenGL Canvas	Assignee:	Krita Bugs <krita-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	azagwen, halla
Priority:	NOR
Version First Reported In:	5.2.9
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	Video of attempts to zoom with the aforementioned issue occuring

Description Aza 2025-03-25 09:51:32 UTC

SUMMARY
Zooming in an out as well as the canvas context menu REGULARLY stop stop working, conditions that cause this are hard to pinpoint, however it happens OFTEN, and after a quick internet search, I noticed that I'm far from the only person experiencing this.

The only fix I found is to close and re-open Krita, however this will sometimes fail to work multiple times in a row, while other times it may work for a few hours, or even days.

Some sources of other people with this issue:
https://krita-artists.org/t/suddenly-unable-to-scroll-to-zoom-in-out-with-mousewheel/54284
https://krita-artists.org/t/zooming-problem/12295
https://www.reddit.com/r/krita/comments/uzs66q/i_cant_zoomunzoom_or_right_click_to_get_the/
https://www.reddit.com/r/krita/comments/jxa0c3/cant_zoom_in_krita/
https://www.reddit.com/r/krita/comments/o7k21z/problems_with_zooming_inout_with_a_mouse_wheel/

If this could be pinned down and fixed, a lot of people would be very happy.

STEPS TO REPRODUCE
I am unsure of how to trigger this, some days it happens often, others it doesn't happen, sometimes Krita can run for days with no issue, others it launches with the issue already happening.

OBSERVED RESULT
ALL interaction with the canvas through mouse shortcuts is impossible (scroll wheel and right click)

EXPECTED RESULT
Being able to zoom using the mouse, and to open the context menu using right click

SOFTWARE/OS VERSIONS
Windows: 10

Comment 1 Halla Rempt 2025-03-25 15:07:38 UTC

Hi! Thanks for your report. Could you perhaps make a screen recording of the issue? And it would also be useful to have a tablet log. Easiest is to enable the log viewer docker. You then enable the tablet category, press ctrl-shift-t to enable tablet logging and use the scroll wheel.

Comment 2 Aza 2025-03-25 17:10:43 UTC

(In reply to Halla Rempt from comment #1)
> Hi! Thanks for your report. Could you perhaps make a screen recording of the
> issue? And it would also be useful to have a tablet log. Easiest is to
> enable the log viewer docker. You then enable the tablet category, press
> ctrl-shift-t to enable tablet logging and use the scroll wheel.

Hi Halla! Thanks for the quick reply, I've enabled both of these options, currently I've "fixed" it by swapping to the DX11 canvas, and back to OpenGL, but as soon as it happens again (I know it will, I've been having this problem for quite a while 😅) I'll make sure to record and send over!

Comment 3 Bug Janitor Service 2025-03-26 03:47:00 UTC

🐛🧹 Thanks for your comment!

Automatically switching the status to REPORTED so the team can perform further triage.

In the future you may also do this yourself when providing needed information.

Comment 4 Aza 2025-04-02 19:23:12 UTC

Created attachment 179944 [details]
Video of attempts to zoom with the aforementioned issue occuring

Comment 5 Aza 2025-04-02 19:24:24 UTC

Hi again!

I finally encountered this issue again, on a client project. Due to this the content of my viewport is partly censored through OBS? but the viewport is still visible enough to notice my cursor and whether the image would zoom or not :>

Comment 6 Aza 2025-04-02 19:26:55 UTC

I am once again quite not sure of why this occured again, most notable action I've been doing is going back and forth between Krita and other apps through alt+tab, but it only occured now? Even tho I've spent multiple days doing this prior, and my PC was shut down yesterday which makes it harder to think of as a hardware fatigue issue

Comment 7 Aza 2025-04-02 19:27:45 UTC

Last thing to note: this happens on ALL currently open projects, not just the one in the video's capture